/Engine/Plugins/Experimental/Mutable/Source/CustomizableObject/Public/MuCO/ICustomizableObjectModule.h
If one of these functions returns data with an invalid weak pointer to aUCustomizableObjectExtension, it means that the extension was unloaded without calling UnregisterExtension.
[TArrayView](API\Runtime\Core\Containers\TArrayView)< const [FRegisteredCustomizableObjectPinType](API\Plugins\CustomizableObject\MuCO\FRegisteredCustomizableObjectPin-) > GetExtendedPinTypes() const